CN110616705B - Wedge type pile head with pile side bearing force and pile forming construction method - Google Patents
Wedge type pile head with pile side bearing force and pile forming construction method Download PDFInfo
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- CN110616705B CN110616705B CN201910917854.9A CN201910917854A CN110616705B CN 110616705 B CN110616705 B CN 110616705B CN 201910917854 A CN201910917854 A CN 201910917854A CN 110616705 B CN110616705 B CN 110616705B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/223—Details of top sections of foundation piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
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Abstract
The invention discloses a wedge-type pile head for bearing force on the pile side and a pile-forming construction method, which are characterized in that a conical outer sleeve is sleeved on the pile head of a pipe pile, the inner cavity of the conical outer sleeve is a conical cavity, and the diameter of the top surface of the conical cavity is larger than that of the bottom surface; a cylindrical inner wedge block is wedged between the tubular pile head and the conical outer sleeve from top to bottom, the inner side wall of the cylindrical inner wedge block is attached to the light wall of the pile side, and the inner side wall of the conical outer sleeve is meshed with the outer side wall of the cylindrical inner wedge block in a sawtooth manner; the top surface of the conical outer sleeve is connected with a bowl-shaped impact bearing plate to form an upper hammering steel pile cap, or is connected with a bowl-shaped steel hoop to form a flexible pile cap, and the top surface of the cylindrical inner wedge block protrudes out of the top surface of the tubular pile head. The invention utilizes the cylindrical inner wedge block and the conical outer sleeve with bearing force on the top surface to decompose the stress to the pile side, effectively protects the pile end of the precast tubular pile from being damaged in the construction, solves the problem of inconsistent deformation of the pile part and the soil part between the piles, and improves the bearing capacity and the stability of the composite foundation.
Description
Technical Field
The invention relates to the field of building composite foundations, in particular to a connecting structure of a hammering steel pile cap, a flexible pile cap and a precast pile and a construction method of the connecting structure.
Background
The prefabricated pipe pile technology is widely applied to various soft soil composite foundation treatment projects along with the rapid development of economy in China. The concrete construction method mainly comprises two types of hammering pile sinking and static pressure pile sinking, wherein the hammering method utilizes the impact force of a hammer to overcome the resistance of soil to the pile, so that the pile sinks to the designed depth or reaches a bearing layer, the construction is flexible, the pile machine has lower requirement on the endurance of a foundation, the construction progress is fast, the efficiency is high, the operation is convenient, and the stratum penetrability is good. Because the pile end bears larger external load, the engineering technical problems of pile top, pile body easy to damage, pile body inclination and the like are easy to occur. In the using process, the pile end bears a larger external load, and the phenomenon of damage caused by larger local stress of the pile end can also be generated. At present, the traditional method is to add reinforcing steel bars, stirrups and reinforcing steel bar meshes within the range of 0.5-1 m of a pile head to enhance the bearing capacity and the anti-damage capacity of the pile end of the precast pile, but the external load is large, the bearing capacity of the pile end is easy to generate a stress concentration phenomenon, the accidents of local damage of the pile end and inclination of a pile body occur, and the rejection rate of the precast pile is high.
The prefabricated tubular pile composite foundation generally adopts stake, pile cap, geogrid and mattress pad layer in the use to the pile cap that adopts is the great rigid pile cap of rigidity, and its effect lies in protecting the pile head in order to prevent that the pile head from breaking, and wherein geogrid and mattress pad layer that adopt constitute add the muscle pad layer. Because the bearing capacity of the pile is far greater than the upper load borne by the pile-net composite foundation, and the bearing capacity of the soil between the piles is far smaller than that of the pile, the deformation of the pile body part is originally smaller than that of the soil body part between the piles, and the deformation difference between the pile body part and the soil body part is more obvious under the action of long-term load. After long-term use, the deformation of the pile body part and the soil part between the piles is not coordinated, and the stability of the upper structure is seriously influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a wedge-type pile head with a pile side bearing capacity and a pile-forming construction method, wherein external loads are dispersedly transmitted to the pile end and the pile side, so that the pile end of a prefabricated pipe pile is protected, the problem of incongruity of deformation of a pile body part and an inter-pile soil part is solved, the rejection rate of the prefabricated pipe pile is reduced, and the bearing capacity and the stability of a composite foundation are improved.
The invention adopts the following technical scheme for solving the technical problems:
the wedge-shaped pile head with the pile side bearing force has the characteristics that: the pile head of the tubular pile is sleeved with a conical outer sleeve, the inner cavity of the conical outer sleeve is a conical cavity, and the diameter of the top surface of the conical cavity is larger than that of the bottom surface of the conical cavity; a cylindrical inner wedge block is wedged between the tubular pile head and the conical outer sleeve from top to bottom, the inner side wall of the cylindrical inner wedge block is attached to the light wall of the pile side, and the inner side wall of the conical outer sleeve is meshed with the outer side wall of the cylindrical inner wedge block in a sawtooth manner; the toper outer sleeve is connected bowl form and is hit the board at the top surface and form upper portion hammering steel pile cap, or connects bowl form hoop and form flexible pile cap, the top surface protrusion in tubular pile head's of voussoir top surface in the cylindric.
The wedge-shaped pile head with the pile side bearing capacity is also characterized in that: the conical outer sleeve is in an integral or tile shape, the tile-shaped conical outer sleeve is in a cylindrical shape formed by encircling at least two tile-shaped steel pipes, and the steel pipes are fixed by arranging hoops.
The wedge-shaped pile head with the pile side bearing capacity is also characterized in that: the structural form that the conical outer sleeve is connected with the bowl-shaped striking plate on the top surface is as follows: placing a net-shaped steel plate on the top surface of the tubular pile head, arranging a rubber pad on the net-shaped steel plate, and fixedly connecting the bowl-shaped impact-bearing plate and the conical outer sleeve into a whole by utilizing a high-strength bolt to penetrate through the rubber pad and the net-shaped steel plate at the bowl bottom edge of the bowl-shaped impact-bearing plate and to be fixedly connected with the upper section of the conical outer sleeve so as to form an upper hammering steel pile cap; the top surface of the cylindrical inner wedge block protrudes out of the upper plane of the reticular steel plate, and the cylindrical inner wedge block and the conical outer sleeve with the top surface bearing force are decomposed to the pile side.
The wedge-shaped pile head with the pile side bearing capacity is also characterized in that: the structural form that the conical outer sleeve is connected with the bowl-shaped steel hoop on the top surface is as follows: placing a net-shaped steel plate on the top surface of a pile head of the tubular pile, arranging a rubber pad on the net-shaped steel plate, enabling a high-strength bolt to penetrate through the rubber pad and the net-shaped steel plate by utilizing a lower bolt section of the high-strength bolt to be firmly connected with an upper section of a conical outer sleeve, integrally arranging outwards inclined support rods on the upper part of the high-strength bolt, arranging a plurality of circular stirrups between the inclined support rods to form a bowl-shaped steel hoop, binding a steel screen mesh in the bowl-shaped steel hoop, and forming a flexible pile cap by the steel screen mesh and the bowl-shaped steel; the top surface of the cylindrical inner wedge block protrudes out of the top surface of the reticular steel plate; the top bearing force of the cylindrical inner wedge block and the conical outer sleeve is decomposed to the pile side.
The invention relates to a pile-forming construction method of a wedge-type pile head aiming at the bearing force of the side of a pile, which is characterized by comprising the following steps:
and 4, replacing and connecting the upper hammering steel pile cap into a flexible pile cap to complete pile forming construction.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is provided with a wedge structure consisting of the conical outer sleeve and the cylindrical inner wedge block, and the cylindrical inner wedge block and the conical outer sleeve with the top bearing force effectively decompose the stress to the pile side, thereby effectively protecting the pile end of the precast tubular pile from being damaged in the construction, reducing the rejection rate of the precast tubular pile, effectively solving the problem of inconsistent deformation of the pile body part and the soil part between piles, and improving the bearing capacity and stability of the composite foundation.
2. The dismounting process of the upper part hammering steel pile and the cap flexible pile cap is convenient to mount, simple and easy to manufacture and high in speed, and the bowl-shaped impact bearing plate in the upper part hammering steel pile can be repeatedly used;
3. the invention adopts the bowl-shaped impact bearing plate, the bowl-shaped structure of which is matched with the head of the pile driver, thereby effectively avoiding the deviation of the impact point position of the pile head when the pile driver is arranged, ensuring the accurate impact, and avoiding the damage to the pile end caused by larger local bearing capacity and stress concentration;
drawings
FIG. 1 is a schematic structural view of a wedge pile head according to the present invention;
FIG. 2 is a schematic structural view of an upper hammered steel pile cap according to the present invention;
FIG. 3 is a schematic view of the hoop structure of the present invention;
FIG. 4 is a schematic view of a flexible pile cap according to the present invention;
FIG. 5 is a schematic top view of the flexible pile cap of the present invention;
reference numbers in the figures: the concrete pile comprises a conical outer sleeve 1, a cylindrical inner wedge block 2, a rubber pad 3, a bowl-shaped impact bearing plate 4, a high-strength bolt 5, a hoop 6, a steel mesh screen 7, a tubular pile 8, a net-shaped steel plate 9, a circular stirrup 10, an inclined stay bar 11 and a nut 12.
Detailed Description
Referring to fig. 1, the wedge-type pile head bearing force on the pile side in this embodiment has the structural form:
the pile head of the tubular pile 8 is sleeved with a conical outer sleeve 1, the inner cavity of the conical outer sleeve 1 is a conical cavity, and the diameter of the top surface of the conical cavity is larger than that of the bottom surface; a cylindrical inner wedge block 2 is wedged between the pile head of the pipe pile and the conical outer sleeve 1 from top to bottom, the inner side wall of the cylindrical inner wedge block 2 is attached to the light wall of the pile side, and the inner side wall of the conical outer sleeve 1 is meshed with the outer side wall of the cylindrical inner wedge block 2 in a sawtooth manner; by utilizing the occlusion effect of the sawteeth, the cylindrical inner wedge blocks 2 can only do relative motion downwards under the action of upper load but can not do relative motion upwards, so that the tubular inner wedge blocks can pack the pile head of the tubular pile more tightly, and the four cylindrical inner wedge blocks which are arranged in a split way jointly form a cone with a cylindrical cavity.
In specific implementation, the conical outer sleeve 1 is connected with the bowl-shaped impact bearing plate 4 at the top surface to form an upper hammering steel pile cap, and the bowl-shaped inner cavity of the bowl-shaped impact bearing plate 4 ensures that the acting point position on the pile head coincides with the central line of the tubular pile 8 when the pile driver is arranged, so that the acting force is accurate, and the damage to the pile end caused by large load in the construction period is effectively avoided.
Or a bowl-shaped steel hoop consisting of the circular hooping 10 and the inclined stay bar 11 is connected to form a flexible pile cap, and the top surface of the cylindrical inner wedge block protrudes out of the top surface of the pile head of the tubular pile.
In this embodiment, the conical outer sleeve is in an integral or tile shape, the tile-shaped conical outer sleeve is in a cylindrical shape surrounded by at least two tile-shaped steel pipes, a pair of hoops 6 shown in fig. 3 are arranged to fix the steel pipes, and the pair of hoops 6 are fastened and connected by bolts 12; or the steel pipe sheets are directly provided with lugs, and the two adjacent steel pipe sheets are fastened and connected by the lugs.
Referring to fig. 2, the structure form of the conical outer sleeve connecting the bowl-shaped striking plate on the top surface in the embodiment is as follows:
placing a reticular steel plate 9 on the top surface of the tubular pile head, arranging a rubber pad 3 on the reticular steel plate 9, and fixedly connecting the bowl-shaped impact bearing plate 4 and the conical outer sleeve 1 into a whole by utilizing a high-strength bolt 5 to penetrate through the rubber pad 3 and the reticular steel plate 9 at the bowl bottom edge of the bowl-shaped impact bearing plate 4 and be tightly connected with the upper section of the conical outer sleeve 1, so as to form an upper hammering steel pile cap; the top surface of the cylindrical inner wedge block protrudes out of the upper plane of the reticular steel plate, and the cylindrical inner wedge block and the conical outer sleeve with the top surface bearing force are decomposed to the pile side; the hole position in the reticular steel plate 9 ensures that the top surface of the cylindrical inner wedge block 2 protrudes out of the upper plane of the reticular steel plate 9, the rubber pad 3 is an annular pad, and the structural formula is utilized to balance the bearing capacity of the pile end and the side frictional resistance of the pile, so that the damage caused by the overlarge bearing capacity of the pile end is avoided.
Referring to fig. 4 and 5, the conical outer sleeve in this embodiment is connected to the bowl-shaped steel hoop at the top surface in the following structural form:
placing a reticular steel plate 9 on the top surface of the pile head of the tubular pile 8, arranging a rubber pad 3 on the reticular steel plate 9, firmly connecting the high-strength bolt 5 with the upper section of the conical outer sleeve 1 by penetrating the rubber pad 3 and the reticular steel plate 9 through the lower bolt section of the high-strength bolt 5, integrally arranging outwards inclined support rods 11 on the upper part of the high-strength bolt 5, arranging a plurality of circular stirrups 10 between the inclined support rods 11 to form a bowl-shaped steel hoop, binding a steel screen mesh in the bowl-shaped steel hoop, and forming a flexible pile cap by the steel screen mesh and the bowl-shaped steel hoop; the top surface of the cylindrical inner wedge block 2 protrudes out of the top surface of the reticular steel plate 9; the top bearing force of the cylindrical inner wedge block 2 and the conical outer sleeve 1 is decomposed to the pile side.
The pile-forming construction method of the wedge-type pile head for bearing the force on the side of the pile is carried out according to the following steps:
And 2, driving the cylindrical inner wedge block 2 downwards into the conical outer sleeve 1 by hammering, and keeping the top surface of the cylindrical inner wedge block 2 higher than the upper plane of the reticular steel plate by not less than 1 cm.
And 3, connecting a bowl-shaped impact bearing plate 4 to the upper part of the conical outer sleeve 1 to form an upper part hammering steel pile cap of the precast tubular pile, hoisting the precast tubular pile provided with the upper part hammering steel pile cap to a specified impact position, and then impacting the precast tubular pile to a preset height by a pile driver.
And 4, replacing and connecting the upper hammering steel pile cap into a flexible pile cap to complete pile forming construction.
Claims (3)
1. A wedge type pile head with bearing force on the pile side is characterized in that: the pile head of the tubular pile (8) is sleeved with a conical outer sleeve (1), the inner cavity of the conical outer sleeve (1) is a conical cavity, and the diameter of the top surface of the conical cavity is larger than that of the bottom surface of the conical cavity; a cylindrical inner wedge block (2) is wedged between the tubular pile head and the conical outer sleeve (1) from top to bottom, the inner side wall of the cylindrical inner wedge block (2) is attached to the light wall of the pile side, and the inner side wall of the conical outer sleeve (1) is meshed with the outer side wall of the cylindrical inner wedge block (2) in a sawtooth manner; the top surface of the conical outer sleeve (1) is connected with a bowl-shaped impact bearing plate (4) to form an upper hammering steel pile cap, or is connected with a bowl-shaped steel hoop to form a flexible pile cap, and the top surface of the cylindrical inner wedge block protrudes out of the top surface of a tubular pile head;
the structural form that the conical outer sleeve is connected with the bowl-shaped striking plate on the top surface is as follows: placing a reticular steel plate (9) on the top surface of the tubular pile head, arranging a rubber pad (3) on the reticular steel plate, and fixedly connecting the bowl-shaped impact bearing plate (4) and the conical outer sleeve (1) into a whole by utilizing a high-strength bolt (5) to penetrate through the rubber pad (3) and the reticular steel plate (9) at the bowl bottom edge of the bowl-shaped impact bearing plate (4) and fastening the upper section of the conical outer sleeve (1) to form an upper hammering steel pile cap; the top surface of the cylindrical inner wedge block (2) protrudes out of the upper plane of the reticular steel plate (9), and the cylindrical inner wedge block (2) with the top surface bearing force and the conical outer sleeve (1) are stressed and decomposed to the pile side;
the structural form that the conical outer sleeve is connected with the bowl-shaped steel hoop on the top surface is as follows: placing a net-shaped steel plate (9) on the top surface of the pile head of the tubular pile (8), arranging a rubber pad (3) on the net-shaped steel plate (9), enabling a lower bolt section of a high-strength bolt (5) to penetrate through the rubber pad (3) and the net-shaped steel plate (9) to be firmly connected with the upper section of the conical outer sleeve (1), integrally arranging outwards-inclined support rods (11) on the upper part of the high-strength bolt (5), arranging a plurality of circular stirrups (10) between the inclined support rods (11) to form a bowl-shaped steel hoop, binding a steel screen mesh in the bowl-shaped steel hoop, and forming a flexible pile cap by the steel screen mesh and the bowl-shaped steel hoop; the top surface of the cylindrical inner wedge block (2) protrudes out of the top surface of the reticular steel plate; the top surface bearing force of the cylindrical inner wedge block (2) and the conical outer sleeve (1) is decomposed to the pile side.
2. The wedge-type pile head bearing force on the pile side of claim 1, which is characterized in that: the conical outer sleeve is in an integral or tile shape, the tile-shaped conical outer sleeve is in a cylindrical shape formed by encircling at least two tile-shaped steel pipes, and a hoop (6) is arranged for fixing the steel pipes.
3. A pile-forming construction method aiming at the wedge type pile head bearing force on the pile side of claim 1, which is characterized by comprising the following steps:
step 1, forming a hollow cylinder by a conical outer sleeve and a cylindrical inner wedge block, wrapping the hollow cylinder on the periphery of a pile head of a precast tubular pile, and protruding the top surface of the hollow cylinder to the upper plane of a reticular steel plate arranged on the top surface of the precast tubular pile;
step 2, driving the cylindrical inner wedge block downwards into the conical outer sleeve by hammering, and keeping the top surface of the cylindrical inner wedge block higher than the upper plane of the reticular steel plate by not less than 1 cm;
step 3, connecting a bowl-shaped impact bearing plate to the upper part of the conical outer sleeve to form an upper part hammering steel pile cap of the precast tubular pile, hoisting the precast tubular pile provided with the upper part hammering steel pile cap to a specified driving position, and driving the precast tubular pile to a preset height by a pile driver;
and 4, replacing and connecting the upper hammering steel pile cap into a flexible pile cap to complete pile forming construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910917854.9A CN110616705B (en) | 2019-09-26 | 2019-09-26 | Wedge type pile head with pile side bearing force and pile forming construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910917854.9A CN110616705B (en) | 2019-09-26 | 2019-09-26 | Wedge type pile head with pile side bearing force and pile forming construction method |
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| Publication Number | Publication Date |
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| CN110616705A CN110616705A (en) | 2019-12-27 |
| CN110616705B true CN110616705B (en) | 2021-04-06 |
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| CN113931168B (en) * | 2021-10-19 | 2023-03-14 | 安徽省公路桥梁工程有限公司 | Connecting structure of precast pile configured with glass fiber reinforcement and construction method of connecting structure |
| CN114108677A (en) * | 2021-12-10 | 2022-03-01 | 安徽省公路桥梁工程有限公司 | Precast pile with glass fiber reinforced bars and pile forming and connecting mode |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8418101D0 (en) * | 1984-07-17 | 1984-08-22 | Serf Ltd | Device for applying impact |
| JP4623596B2 (en) * | 2006-10-31 | 2011-02-02 | ジャパンパイル株式会社 | Pile head bias adjustment device |
| CN103074889B (en) * | 2013-01-27 | 2014-08-13 | 西安科技大学 | Flexible pile cap for composite foundation |
| CN208023571U (en) * | 2018-02-12 | 2018-10-30 | 周兆弟 | Pile chuck and piling machine |
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Address after: 230601 room 8306, floor 3, building 4 (3 b), innovation and entrepreneurship Park, No. 268, Furong Road, Hefei Economic and Technological Development Zone, Anhui Province Applicant after: Anhui Yonghao Construction Engineering Co.,Ltd. Address before: 230001 Blue Business Port 188 Qianshan Road, Shushan District, Hefei City, Anhui Province Applicant before: Anhui Yonghao Construction Engineering Co.,Ltd. |
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